my chevy cobalt keeps getting hot after changing thermostat

10

Asked by Mar 10, 2016 at 09:22 PM about the 2006 Chevrolet Cobalt LTZ

Question type: Maintenance & Repair

The engine from cold will heat up to 221 degrees then turn on the fan. It might cool down at first to 185-190 but then slowly creep up past 221 and hit 240 before I shut off the engine. The cooling fan is working normal and stays on at these extreme temps. I have replaced the thermostat and the coolant with dexcool, and made sure the system was purged of air bubbles. The car does not have any coolant leaks. I'm thinking it may have a plugged heater core restricting flow, I haven't pulled the heater core hoses off to see if it doesn't have good flow or done a chemical test to see if it's a head gasket issue. Has anyone else had these same symptoms and have any good pointers. i don't want to just start throwing parts at it if I have overlooked anything obvious.
Thanks

6 Answers

58,585

The heater core is not the issue,if fans is running right and there is no fluid lost,you have a bad water pump.

58,585

if it is a head issue,you will have coolant lost out of the tail pipe or in your oil,if you have none of these your pump is bad.

10

I didn't think a water pump could fail that way. I'm used to older motors that the pump is an impeller that doesn't wear out and the only failure is a leak at the bearing. I guess these newer cars have pumps made of plastic parts or impellers that are of a soft material?

58,585

No,there not plastic there metal impellar,but they where down and want pump right,change the pump,you will fix your issue,if you are not losing coolant.

Best Answer
10

Yeah it doesn't have the signs of typical head gasket issue, no white smoke or smell of coolant burning and no coolant in the oil either. Gonna change the pump and hope for the best. Thanks for the quick replies! Two heads are better than one sometimes.

1 out of 1 people think this is helpful.
58,585

You are welcome.

Your Answer

Add photo

Related Questions

  • why is coblat running hot 3 answers

    cobalt run hot senor has been check

    2007 Chevrolet Cobalt LS

    -

    Maintenance & Repair

  • 06 Cobalt Rough Idle/Stall when stopping or quick deceleration 51 answers

    Hello All, Here is the problem I have. 06 Cobalt LT 2.2l 103065 Miles When decelerating on the freeway to come to a virtual stop for traffic, when stopping at a stop light, when pulling out of the ...

    2006 Chevrolet Cobalt LT

    -

    Maintenance & Repair

  • how hot is to hot for a 2005 cobolt? 6 answers

    I have a 2005 Chevy cobalt and live in Maine. It snowed today and while I was driving home, my car had to work a little harder to get up hills because of the snow, and hit 212. I was once told that i...

    2005 Chevrolet Cobalt Base

    -

    Maintenance & Repair

  • Coolant Temperature Too High..?? 39 answers

    i own a 2007 chevy cobalt ls coupe. in traffic, my car goes up to 220 degrees, even when im not moving, and once i start to drive, it goes down. if im not moving, the fan kicks on at 220 degrees. i do...

    2007 Chevrolet Cobalt 2 Dr LS Coupe

    -

    Maintenance & Repair

  • Thermostat 1 answer

    How do I get at the thermostat on a '06 Cobalt?

    2006 Chevrolet Cobalt

    -

    Maintenance & Repair

Cobalt

Looking for a Used Cobalt in your area?

CarGurus has 4,988 nationwide Cobalt listings starting at $1,000.

ZIP:

Search Chevrolet Cobalt Questions

Chevrolet Cobalt Experts

#1 lightGear
lightGear
Reputation 1,080
#2 FordNut
FordNut
Reputation 1,040
#3 dandyoun
dandyoun
Reputation 900
View All

Related Models For Sale

Used Honda Civic
1,173 Great Deals out of 67,654 listings starting at $1,500
Used Chevrolet Malibu
1,154 Great Deals out of 80,725 listings starting at $2,495
Used Ford Focus
1,301 Great Deals out of 60,647 listings starting at $1,295
Used Ford Mustang
719 Great Deals out of 39,136 listings starting at $1,000
Used Chevrolet Impala
998 Great Deals out of 36,811 listings starting at $1,800
Used Toyota Corolla
1,417 Great Deals out of 69,993 listings starting at $988
Used Honda Accord
1,264 Great Deals out of 78,832 listings starting at $969
Used Nissan Altima
1,350 Great Deals out of 86,045 listings starting at $695
Used Honda Civic Coupe
334 Great Deals out of 17,421 listings starting at $1,000
Used Chevrolet Cavalier
1,376 listings starting at $1,000
Used Toyota Camry
1,525 Great Deals out of 101,602 listings starting at $700
Used Ford Fusion
1,283 Great Deals out of 74,013 listings starting at $1,295

Used Cars For Sale

2007 Chevrolet Cobalt LTZ For Sale
12 listings starting at $3,799
2006 Chevrolet Cobalt LTZ For Sale
13 listings starting at $2,595